error: trivial regex
  --> tests/ui/regex.rs:19:45
   |
LL |     let pipe_in_wrong_position = Regex::new("|");
   |                                             ^^^
   |
   = help: the regex is unlikely to be useful as it is
   = note: `-D clippy::trivial-regex` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::trivial_regex)]`

error: trivial regex
  --> tests/ui/regex.rs:21:60
   |
LL |     let pipe_in_wrong_position_builder = RegexBuilder::new("|");
   |                                                            ^^^
   |
   = help: the regex is unlikely to be useful as it is

error: regex syntax error: invalid character class range, the start must be <= the end
  --> tests/ui/regex.rs:23:42
   |
LL |     let wrong_char_ranice = Regex::new("[z-a]");
   |                                          ^^^
   |
   = note: `-D clippy::invalid-regex` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::invalid_regex)]`

error: regex syntax error: invalid character class range, the start must be <= the end
  --> tests/ui/regex.rs:26:37
   |
LL |     let some_unicode = Regex::new("[é-è]");
   |                                     ^^^

error: regex parse error:
           (
           ^
       error: unclosed group
  --> tests/ui/regex.rs:29:33
   |
LL |     let some_regex = Regex::new(OPENING_PAREN);
   |                                 ^^^^^^^^^^^^^

error: trivial regex
  --> tests/ui/regex.rs:31:53
   |
LL |     let binary_pipe_in_wrong_position = BRegex::new("|");
   |                                                     ^^^
   |
   = help: the regex is unlikely to be useful as it is

error: regex parse error:
           (
           ^
       error: unclosed group
  --> tests/ui/regex.rs:33:41
   |
LL |     let some_binary_regex = BRegex::new(OPENING_PAREN);
   |                                         ^^^^^^^^^^^^^

error: regex parse error:
           (
           ^
       error: unclosed group
  --> tests/ui/regex.rs:34:56
   |
LL |     let some_binary_regex_builder = BRegexBuilder::new(OPENING_PAREN);
   |                                                        ^^^^^^^^^^^^^

error: regex parse error:
           (
           ^
       error: unclosed group
  --> tests/ui/regex.rs:46:37
   |
LL |     let set_error = RegexSet::new(&[OPENING_PAREN, r"[a-z]+\.(com|org|net)"]);
   |                                     ^^^^^^^^^^^^^

error: regex parse error:
           (
           ^
       error: unclosed group
  --> tests/ui/regex.rs:47:39
   |
LL |     let bset_error = BRegexSet::new(&[OPENING_PAREN, r"[a-z]+\.(com|org|net)"]);
   |                                       ^^^^^^^^^^^^^

error: regex parse error:
           \b\c
             ^^
       error: unrecognized escape sequence
  --> tests/ui/regex.rs:54:42
   |
LL |     let escaped_string_span = Regex::new("\\b\\c");
   |                                          ^^^^^^^^
   |
   = help: consider using a raw string literal: `r".."`

error: regex syntax error: duplicate flag
  --> tests/ui/regex.rs:56:34
   |
LL |     let aux_span = Regex::new("(?ixi)");
   |                                  ^ ^

error: regex syntax error: pattern can match invalid UTF-8
  --> tests/ui/regex.rs:62:53
   |
LL |     let invalid_utf8_should_lint = Regex::new("(?-u).");
   |                                                     ^

error: trivial regex
  --> tests/ui/regex.rs:67:33
   |
LL |     let trivial_eq = Regex::new("^foobar$");
   |                                 ^^^^^^^^^^
   |
   = help: consider using `==` on `str`s

error: trivial regex
  --> tests/ui/regex.rs:70:48
   |
LL |     let trivial_eq_builder = RegexBuilder::new("^foobar$");
   |                                                ^^^^^^^^^^
   |
   = help: consider using `==` on `str`s

error: trivial regex
  --> tests/ui/regex.rs:73:42
   |
LL |     let trivial_starts_with = Regex::new("^foobar");
   |                                          ^^^^^^^^^
   |
   = help: consider using `str::starts_with`

error: trivial regex
  --> tests/ui/regex.rs:76:40
   |
LL |     let trivial_ends_with = Regex::new("foobar$");
   |                                        ^^^^^^^^^
   |
   = help: consider using `str::ends_with`

error: trivial regex
  --> tests/ui/regex.rs:79:39
   |
LL |     let trivial_contains = Regex::new("foobar");
   |                                       ^^^^^^^^
   |
   = help: consider using `str::contains`

error: trivial regex
  --> tests/ui/regex.rs:82:39
   |
LL |     let trivial_contains = Regex::new(NOT_A_REAL_REGEX);
   |                                       ^^^^^^^^^^^^^^^^
   |
   = help: consider using `str::contains`

error: trivial regex
  --> tests/ui/regex.rs:85:40
   |
LL |     let trivial_backslash = Regex::new("a\\.b");
   |                                        ^^^^^^^
   |
   = help: consider using `str::contains`

error: trivial regex
  --> tests/ui/regex.rs:89:36
   |
LL |     let trivial_empty = Regex::new("");
   |                                    ^^
   |
   = help: the regex is unlikely to be useful as it is

error: trivial regex
  --> tests/ui/regex.rs:92:36
   |
LL |     let trivial_empty = Regex::new("^");
   |                                    ^^^
   |
   = help: the regex is unlikely to be useful as it is

error: trivial regex
  --> tests/ui/regex.rs:95:36
   |
LL |     let trivial_empty = Regex::new("^$");
   |                                    ^^^^
   |
   = help: consider using `str::is_empty`

error: trivial regex
  --> tests/ui/regex.rs:98:44
   |
LL |     let binary_trivial_empty = BRegex::new("^$");
   |                                            ^^^^
   |
   = help: consider using `str::is_empty`

error: compiling a regex in a loop
  --> tests/ui/regex.rs:125:21
   |
LL |         let regex = Regex::new("a.b");
   |                     ^^^^^^^^^^
   |
help: move the regex construction outside this loop
  --> tests/ui/regex.rs:122:5
   |
LL |     loop {
   |     ^^^^
   = note: `-D clippy::regex-creation-in-loops` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::regex_creation_in_loops)]`

error: compiling a regex in a loop
  --> tests/ui/regex.rs:127:21
   |
LL |         let regex = BRegex::new("a.b");
   |                     ^^^^^^^^^^^
   |
help: move the regex construction outside this loop
  --> tests/ui/regex.rs:122:5
   |
LL |     loop {
   |     ^^^^

error: compiling a regex in a loop
  --> tests/ui/regex.rs:133:25
   |
LL |             let regex = Regex::new("a.b");
   |                         ^^^^^^^^^^
   |
help: move the regex construction outside this loop
  --> tests/ui/regex.rs:122:5
   |
LL |     loop {
   |     ^^^^

error: compiling a regex in a loop
  --> tests/ui/regex.rs:138:32
   |
LL |             let nested_regex = Regex::new("a.b");
   |                                ^^^^^^^^^^
   |
help: move the regex construction outside this loop
  --> tests/ui/regex.rs:137:9
   |
LL |         for _ in 0..10 {
   |         ^^^^^^^^^^^^^^

error: aborting due to 28 previous errors